Incoming QSD Intern · SIG · Summer 2026

Johnathan Mo

I work where quantitative finance, software engineering, and tech content meet - shipping systems by day and teaching 105K+ people how to break into CS the rest of the time.

NOW

Quantitative Strategy Developer (QSD) Intern

Susquehanna International Group (SIG) · Philadelphia · Summer 2026

PAST

Software Engineering Intern

Google · Borglet team · Summer 2025

STUDY

B.S. in Computer Science

Columbia University · Class of May 2026

CREATE

YouTube creator · @jmooooooooo

105K+ subscribers · CS, coding & tech-career content

See the work Watch on YouTube

// snapshot

105K+

YouTube subscribers

consecutive hackathon wins

projects shipped

'26

Columbia CS, B.S.

// projectsthings I have built and shipped

Agentbook

The first company run entirely by AI agents - autonomous teammates that plan, build, and ship together with humans in the loop.

AI agentsAutonomySystems

Second Self

A digital twin that learns how you think and act, then stands in for you. Built fast, won the hackathon.

Digital twinHackathon winnerLLMs

Flutterli

A platform supporting people with developmental disabilities - accessible by design, built to actually be used.

AccessibilityPlatformImpact

Prompt Book

A Claude Code tool that turns the prompts you rely on into a reusable, organized library for faster agentic coding.

Developer toolClaude CodeDX

// experiencewhere I have spent my time

Quantitative Strategy Developer (QSD) Intern
Summer 2026
Susquehanna International Group · Philadelphia
Joining SIG in Philadelphia to build the models and tooling behind quantitative trading strategies.
Software Engineering Intern
Summer 2025
Google · Borglet team
Worked on Borglet, the node agent at the heart of Google's cluster management, on infrastructure that runs at planet scale.
Creator
Ongoing
YouTube · @jmooooooooo
Making CS, coding, and tech-career content for 105K+ subscribers - internships, interviews, and how the industry actually works.
B.S. in Computer Science
Class of May 2026
Columbia University
Studying computer science with a focus on the systems and quantitative work that shows up in everything above.

// wins

CONSECUTIVE WINS

Five hackathons entered, five hackathons won - an unbroken streak capped by TreeHacks '26, Stanford's flagship hackathon. Build fast, build something real, win.